Lubricant compressor



July 1s, 1929. D. F. FESLER 1,120,890

LUBRI CANT COMPRES S OR Filed April 27, 1925 llatented duly lr6, i929,

PATENT FFlCE..

DQUGLXS F.. ESLER, @F HECAG, lLilllll'S, ASSIGNOR T0 ALEMITE MANUFACTUR;

EN@ CRFMTON, @E HEUAGO, XLLINJIS, A URPQRATEON F DELAWARE. i

Application leii April 27,

My invention relates to improvements in lubricant compressors, and is particularly concerned with the provision of a lubricant compressor adapted to form part of a lubrieating system comprising a plurality ot iittings or nipples to be secured to bearings to be lubricated, and a compressor tor successvely supplying lubricant under high pressuie to sai nipples or fittings. 'lhe objects of my invention are First. 'llo provide a compressor ot the character described, by means of which the lubricant delivered to the fittings can be placed under high pressure by the use of one il@ hand, thereby leaving the other hand tree to manipulate the coupling for successively making connection with the various fittings; Second. 'lo provide a compressor or the character described comprising a low presa@ sure cylinder of comparatively large capacity, and a high pressure cylinder adapted to receive lubricant from the low pressure cylinder and deliver it to the fittings under high pressure, in combination with means 25 whereby a single 'force will place the lubricant in both or said cylinders under pressure l Third. To. provide a compressor such as described in which` the priming of the high pressure cylinder by the low pressure cylinder is automatically accomplished, and

Fourth. To provide a compressor such as described which is simple in construction, economical to manufacture, and easy to operate. v D

@ther objects will appear as this description progresses, reference being had to the accompanying drawings, in which Figure l is a vertical longitudinal section; Figure 2 is a transverse section talren on line 2-2 or" Figure 1, and

Figure 3 is a central longitudinal section through a coupling member which may be vused as a part ot my compressor. f5 'llhe embodiment ot my invention disclosed herein comprises a low pressure cylinder 5, in which is mounted a piston comprising the follower plate o, the two cup leathers 7 and 8, which are arranged with their bottoms in opposed relation on opposite sides of the follower plat@ 6, and the two tace plates 9 and 1U which are mounted in the bottoms ot the cup leathers 7 and 8. These elements are all secured to the inner end of the piston rod l1., which is reciprocably mounted in a reas. sensi no. essere.

sleeve l2 threaded into a central opening in the end 13 or the low pressure cylinder. rlhe outer end of this piston rod is suitably bent or curved to provide a `loot 14 for resting y interposed between the piston and theend 13 or the low pressure cylinder, and tending to urge the piston inwardly. l also provide the end 13 of the cylinder 5 with an opening 18 to permit atmospheric pressure to be exerted upon the outer face ofthe piston.

llie open end of the low pressure cylinder 5 is threaded into the 'cap 19 so that it can be removed therefrom for the purpose of ill ing' the low pressure cylinder.

rllie cap 19 is provided with a laterally eX- tending bracket 2O which supports the vertically disposed high pressure cylinder 21. rlhis cylinder communicates with the low pressure cylinder 5 through the passageway 22 extending through the bracket. The lower end of the high pressure cylinder 2l terminates in a valve chamber 23, the lower end of which is closed by the threaded plug 2d. .d check valve 25 formed oi a disc or' libre, the sides of which are atted, as shown at 26, is slidably mounted in the valve chamber, and seats against the shoulder 27 at the outer end oi the high pressure cylinder'.V A compression spring 28 interposed between the check valve and the plug 2i tends to yieldiiigly hold this valve on its seat.

A plunger 30 is slidably mounted in the high pressure cylinder and the hollow boss` 3l. the bore of which registers with the bore oi the high pressure cylinder 2l. For re ciprocating the plunger 30, l provide the bracket 32, which extends outwardly from the high pressure cylinder and on which is pivotally mounted a pair or links (only one of which is shown), the upper ends oi' which carry the pivot pin 3d on which is pivotally mounted the lever 35. rllhis lover is provided with a terminal projection 36 having` a cross-head 37 adapted to contact with. the links 38 to limit the upward movement or the lever 35. rlhe opposite end of the lever 35 is provided with a handle 3S y which is preferably positioned substantially iii iiligiiiiicnt, that is, directly above the low pressure cylinder :3, so that the handle 38 il() Y may be used for carrying the entire compresser.

The upper or outer end of the plunger 30 is provided with a cap 39 having a pair of spaced lugs 40 for receiving an intermediate portion of the lever 25. rlhese lugs are pivotally connected with the lever by means of the pivot pin 41.

A compression spring 42, interposed between the bracket 2O and the cap 39 and surrounding the boss 31, yieldingly urges the plunger 30 in an outward direction. In the uppermost position of this plunger, its lower end raises to a position which permits the lubricantto pass from the passageway 22 into the high pressure cylinder.

The valve chamber 23 is provided with a flexible discharge conduit 43 which ends in a coupling member comprising the sleeve 44 which is swiveled upon the member 45. rlhe member 45 is soldered or otherwise secured to the free end of the conduit 43, and is secured to the sleeve 44 by means of a second sleeve 46. The sleeve 44 has a valve seat 47 therein through which the stem 48 of the valve 49 projects. A tension spring 50 isinterposed between the inner end of the valve-and a cup leather` 51 which seals the joint between the sleeve 44 andthe member 45. This spring tends to yieldingly hold the valve 49 on its seat. Another cup leather 52 lis slidably mounted in the outer end of the sleeve 44 and is adapted to make sealed contact with the end of a tting 53 when the sleeve is passed over the end of the litting, as shown in Finfure 3. A compression spring 54, interposedabetween the cup leather 52 and the valve seat 47, yieldingly urges the cup leather 52 in an outwardly direction, and consequently tends to assist the valve 50 to maintain the valve 49 in its closed position.

rEhe details of construction of the coupling member just shown form no part of my present invention, except as they co-act with the remaining elements described above. l have disclosed this type of coupling member because l prefer to use one containing a valve which automatically opens when a connectionis made with a tting, and which automatically closes when this connection is broken. My invention, however, is not limited to use witlr this type of coupling member, as it may be used with a coupling member which does not embody a valve.

ln the use of my improved compressor, the barrel 5 is first Unthreaded from the cap 19.

The operator then pulls upon the piston rod.

11 until the piston is moved to a position adjacent the closed end of the cylinder 5 where it is held by means of the adjustable. stop 15. rlhe cylinder can then be filled with lubricant and screwed back into the cap 19. The stop 15 is then moved downwardly to a position which will not interfere with the operation of the piston. The operator then connects the coupling member with a fitting for receiving lubricant, and places the foot 14 of the compressor upon the ground, or some other suitable support. Then by oscillating the handle 38, the lubricant can be pumped from the low pressure cylinder through the high pressure cylinder and out through the discharge conduit 43 into the fitting, The pump construction described is such that it forms a complete vacuum in the high pressure cylinder and prevents the return of any lubricant or air to thehigh pressure cylinder,

`so that even though the lubricant in the low pressure cylinder has air entrapped therein, the pump is, nevertheless, capable of supplying lubricant under high pressure to the tittings. v

lt will be apparent that the foot 14 acts as a support for re-acting against the pressure exerted upon the handle 38. When this pressure or force is released, the spring 42 tends to move the plunger 30 outwardly, and the spring 17 tends to push the plunger in the low pressure cylinder inwardly. This action of the spring 17 is supplemented by atmospheric pressure exerted on the outer face of the piston in the low pressure cylinder 5, and, as a matter of fact, atmospheric pressure alone is usually sufficient to move this piston inwardly so that, if desired, the spring 17 may be dispensed with under most circumstances. The downward pressure upon the handle .38 will, of course, tend to move the piston inwardly in the low pressure cylinder, but in this position the plunger 30 is so located that it prevents the lubricant in the low pressure cylinder from being forced into the high pressure cylinder, but as soon as the pressure on the handle' 38 is relieved, the plunger moves outwardly, and permits the high pressure cylinder to be primed from the low pressure cylinder.

While l have described the details of construction of the preferred embodiment of my invention, it is to be clearly understood that my invention is not limited to these details, but is capable of other adaptations and modiications within the scope of the appended claims. i

Having thus described my invention, what I claim is:

l. A lubricant compressor .comprising a low pressure-cylinder having a piston slidable therein. a piston rod secured to said piston and extcndin outwardly through the lower end of saidg low pressure cylinder, a spring Jfor urging said piston inwardly, a cap for the upper end of said low pressure cylinder having a laterally extending bracket a vertically disposed hig 1 pressure cylinder carried by said braclret` said bracket having a passageway for establishing communication between said low pressure and said high pressure cylinders, a discharge conduit for said high pressure cylinder, a checlr valve inn low pressure cylinder having a. piston slidable therein, a piston rod secured to said piston and extending outwardly through the lower end of said low pressure cylinder, a cap for the upper end of said low pressure cylinder having a laterally extending bracket, a high pressure cylinder carried by said bracket, said bracket having a passageway for establishing communication between said low pressure and said high pressure cylinders, a discharge conduit for said high pressure cylinder, a plunger slidable in said high pressure cylinder and means movable toward said piston for reciprocating said plunger.

3. A lubricant compressor comprising a low pressure cylinder having a piston therein, a piston rod connected with said piston and extending through the lower end of said low pressure cylinder, the outer end of said piston rod being provided with a foot for resting upon a suitable support, a high pressure cylinder communicating with said low pressure cylinder and manually operable means for placing pressure upon the lubricant in said high pressure cylinder.

4. A lubricant compresso;` comprising a lowv pressure cylinder, a piston in said low pressure cylinder,- a high pressure cylinder communicating with said low pressure cylinder, and a plunger in said hi h pressure cyl-,- inder, said plunger and pistoneing arranged to move in opposite directions to place pressure upon the lubricant in said compressor, when said plunger is pressed inwardly.

5. A lubricant compressor comprising a low pressure cylinder and a high pressure cylinder communicating with said low pressure 4 cylinder, a lubricant displacing element in each cylinder, a spring for moving one of said lubricant displacing elements relatively to said high pressure cylinder, a handle secured to one of said lubricant displacing elements for moving said last named lubricant displacing element against the tension of said spring and for causing the other lubricant displacing element to force lubricant from said low pressure cylinder into said high pressure cylinder.

6. A lubricant compressor comprising a high pressure cylinder, a low pressure cylinder communicating with oneend of said high pressure cylinder and` arallel therewith, a plunger for isolating said high pressure cyl- `inder from said low pressure cylinder and for displacing lubricant from said high pressure cylinder, a lubricant expelling piston in said low pressure cylinder ttor contacting with the lubricantin saidlow pressure cylinder throughout substantially A its entire length, and common means for causing said v piston and. plunger to place the lubricant in said cylinders under pressure.

7. A lubricant compressor comprisin y a low pressure c linder, a piston in said IOW pressure cylin er, a high pressure cylinder communicating with said low pressure cylinder, al plunger in said high pressure cyllnder, said plunger and piston being arranged to move in opposite directions to place pressure upon'the lubricant in their respective Y i cylinders, and resilient means for moving said piston and plunger in the same direction.

8. In high pressure lubricating apparatus of the class described, a lubricant compressorl comprising a low pressure cylinder, a piston in said low pressure cylinder, a high pressure cylinder communicating with4 said low pressure cylinder, a plunger in said high ressure cylinder, said plunger and piston eing movable in opposite directions -to place pressure upon the lubricant in their respective cylinders, spring means forl advancing said piston, and spring means for retracting said plunger.

9.. A lubricating compressor, comprising in combination, a pair of lubricant containing chambers, a first one of said'chambers adapted to communicate lubricant under pressure to the other chamber, a lubricant discharge nozzle, said other chamber adapted to discharge lubricant under pressure through said nozzle, and common means operable inv DOUGLAS F. FESLER. 

